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CRITERION VISIBILITY [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1989-11-30

English

Subject field(s)
  • Environmental Studies and Analyses
  • Physics of Solids
CONT

Recently both the U. S. Environmental Protection Agency and the Canadian National Research Council have recommended that standards(objectives) be established for fine particles with visibility as a criterion on the basis of the relatively well-defined relationship between visual range and fine particle mass. These fine particles in many cases are photochemical products of gaseous emissions. The basis for estimating visual range from fine particle mass concentration is reasonably well known.

French

Domaine(s)
  • Études et analyses environnementales
  • Physique des solides

Spanish

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